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* gcse.c (reg_clear_last_set): New function. (reg_set_info): If data is non-null, treat it as an sbitmap of registers, set the bit for the register being set. (compute_store_table): Allocate last_set_in with xcalloc. Do not memset this array on each iteration. Pass reg_set_in_block[bb->index] to note_stores while computing last_set_in instead of scanning last_set_in after the first pass through the insns. Clear last_set_in using reg_clear_last_set instead of explicitly rescanning after each insn. If checking is enabled, assert that last_set_in is completely zeroed after each bb has been processed. From-SVN: r74224
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